Science Birthday Party: Blow Up That Balloon Experiment


"Blow Up That Balloon" Science Experiment: What a cheap, easy, and fun science experiment for home, school, or a Science Birthday Party!

As I’ve mentioned in Easy and Cheap Science Birthday Party: A Complete Guide, we did three different hands-on science experiments for my son’s 7th Science Birthday Party. All three worked well and were a huge hit with the kids (check out Experiment #2 and Experiment #3.)

The first experiment we did was called Blow Up That Balloon. A chemical reaction is created in a water bottle which results in a balloon being blown up before the kids’ eyes. They were WOWED by it for sure.

"Blow Up That Balloon" Science Experiment: What a cheap, easy, and fun science experiment for home, school, or a Science Birthday Party!

Before passing out the supplies, I explained to the kids that the vinegar is an acid–so it tastes sour–and the baking soda is a base. I asked: What do you think might happen when we dump the baking soda into the vinegar, if there is a balloon on the top of their bottle? Then, I had them write down or draw a picture of their hypothesis for this experiment in their Science Lab Notebook. After the experiment, while we cleaned up, the little scientists recorded what actually happened. I loved watching their young scientist brains at work!

"Blow Up That Balloon" Science Experiment: What a cheap, easy, and fun science experiment for home, school, or a Science Birthday Party!

Here’s how to do your own Blow Up That Balloon Experiment:

Supplies:

  • baking soda
  • balloons
  • empty water bottles
  • white/distilled vinegar
  • a funnel

"Blow Up That Balloon" Science Experiment: What a cheap, easy, and fun science experiment for home, school, or a Science Birthday Party!

Set Up: Cover the table with plastic table cloth for easy clean up. Tip: My mom suggested next time that we double cover the table and then rip off the top layer after experiments were done. Then, we’d have a fresh covering for snack time at the end.

Directions:

1. Use the funnel to prefill each balloon with about 2-3 tablespoons of baking soda. I just eyeballed it, because it’s hard to mess up. The balloon should be filled about halfway.

2. Then use the funnel to prefill each water bottle about 1/3 of the way full with vinegar. Again, it doesn’t have to be precise.

3. Carefully wrap the end of the balloon around the mouth of the water bottle, being careful not to dump any of the baking soda out into the bottle. Make sure the balloon is tightly around the bottle mouth.

4. When everyone is ready, have the kids dump the baking soda into the bottle. Then, watch as the chemical reaction occurs, releasing gas and filling the balloons.

Need more Science Birthday Party ideas? Check out this post for the entire plan.

Cheap Science Party Signs, Name Tags & More

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  • Secret Lab Notebook front cover (8 1/2 x 11) – Learn more about how to use these HERE.Easy Cheap Science Birthday Party
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Print each of these as many times as you like so that you can cover your walls, tables, and doors with themed Science lab signs. What a deal!

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Posted in Parent Well, Holidays and Traditions, Live Well, Parent Well, Live Well, Party and Holiday Ideas · Tagged ,